Tax Authority Contacts

IRS : www.irs.gov

General Inquiries

• Individual: 800-829-1040

• Business: 800-829-4933

Colorado Department of Revenue: www.colorado.gov/revenue  

Colorado Department of Revenue website offers many services, including: Check Refund Status, Payments, Set Up Login ID and Password, and general guidance about managing your tax account. You will need to provide the following information from your tax return: 

• Your Social Security Number (or Individual Taxpayer Identification Number) 

• The exact whole dollar amount of your refund.

Additional Government Links

Electronic Federal Tax Payments System: www.EFTPS.gov

Colorado Department of Labor and Employment: www.coworkforce.com

Colorado Secretary of State: www.sos.state.co.us